Final answer:
Pulmonary congestive heart failure, causing a backup of blood in the lungs, is due to the failure of the C.left ventricle of the heart.
Step-by-step explanation:
The failure of the left ventricle of the heart would lead to pulmonary congestive heart failure, resulting in a backup of blood in the lungs. When the left ventricle is unable to pump sufficient blood into the systemic circulation, blood in the pulmonary circulation gets backed up, causing increased hydrostatic pressure within pulmonary capillaries. This pressure forces fluid out of the capillaries and into lung tissues, leading to pulmonary edema.
The failure of the left ventricle of the heart would lead to a backup of blood in the lungs, known as pulmonary congestive heart failure. The left ventricle is responsible for pumping oxygenated blood to the rest of the body, but when it fails, blood starts to accumulate in the left atrium, then the pulmonary veins, and finally in the pulmonary capillaries of the lungs. This increased pressure in the pulmonary capillaries causes fluid to be pushed out of them and into the lung tissues, resulting in symptoms of pulmonary edema.